On the Spatial Distribution of Minor Species in Jupiter's Troposphere as Inferred From Juno JIRAM Data
On the Spatial Distribution of Minor Species in Jupiter's Troposphere as Inferred From Juno JIRAM Data
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根据 Juno JIRAM 数据推断木星对流层中小物种的空间分布
DOI：
10.1029/2019je006206
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
D. Turrini
中科院分区：
文献类型：
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作者：
Davide Grassi;A. Adriani;Alessandro Mura;Sushil K. Atreya;L. Fletcher;J. Lunine;Glenn S Orton;S. Bolton;C. Plainaki;G. Sindoni;F. Altieri;A. Cicchetti;B. Dinelli;G. Filacchione;A. Migliorini;M. Moriconi;R. Noschese;A. Olivieri;G. Piccioni;R. Sordini;S. Stefani;F. Tosi;D. Turrini
水，氨，磷化氢，锗烷和砷化氢在木星的对流层的空间分布已推断从木星红外极光成像仪（JIRAM）朱诺数据。测量使我们能够从红外光光谱中检索约3至5巴之间的垂直平均气体浓度。结果被用来创建纬度配置文件。水汽相对湿度随纬度的变化范围为<1%~ 15%以上。在中纬度（30-70°），水汽最大值与气旋带的位置有关，这是从平均纬向风廓线推断出来的（Porco等人，2003年）。高纬度地区（60°以上）北部比南部干燥（平均相对湿度约为2-3%），而南部的湿度在极点附近达到15%。氨体积混合比从1 × 10−4到4 × 10−4变化。在10°N附近存在一个显著的最小值，而数据表明赤道上空的增加。高纬度地区在两个半球是不同的，在南部逐渐增加，在北部与纬度更恒定的值。磷化氢的体积混合比从4 × 10−7到10 × 10−7不等。北赤道带存在明显的极小值。在南纬30°和北纬30°的纬度地区，北方半球的磷化氢含量似乎更高，向极方向减少，而在南半球则相反。JIRAM数据表明，从两极到15°S，密切相关的体积混合比从2 × 10−10增加到8 × 10−10，并以赤道为中心耗尽。而砷化氢则呈现相反的趋势，两极的最大值为6 × 10−10，20°S附近的最小值低于1 × 10−10。
The spatial distribution of water, ammonia, phosphine, germane, and arsine in the Jupiter's troposphere has been inferred from the Jovian Infrared Auroral Mapper (JIRAM) Juno data. Measurements allow us to retrieve the vertically averaged concentration of gases between ~3 and 5 bars from infrared‐bright spectra. Results were used to create latitudinal profiles. The water vapor relative humidity varies with latitude from <1% to over 15%. At intermediate latitudes (30–70°) the water vapor maxima are associated with the location of cyclonic belts, as inferred from mean zonal wind profiles (Porco et al., 2003). The high‐latitude regions (beyond 60°) are drier in the north (mean relative humidity around 2–3%) than the south, where humidity reaches 15% around the pole. The ammonia volume mixing ratio varies from 1 × 10−4 to 4 × 10−4. A marked minimum exists around 10°N, while data suggest an increase over the equator. The high‐latitude regions are different in the two hemispheres, with a gradual increase in the south and more constant values with latitude in the north. The phosphine volume mixing ratio varies from 4 × 10−7 to 10 × 10−7. A marked minimum exists in the North Equatorial Belt. For latitudes poleward 30°S and 30°N, the northern hemisphere appears richer in phosphine, with a decrease toward the pole, while the opposite is observed in the south. JIRAM data indicate an increase of germane volume mixing ratio from 2 × 10−10 to 8 × 10−10 from both poles to 15°S, with a depletion centered around the equator. Arsine presents the opposite trend, with maximum values of 6 × 10−10 at the two poles and minima below 1 × 10−10 around 20°S.
影响因子：
3.2
作者：
Fletcher, L. N.;Orton, G. S.;Irwin, P. G. J.
通讯作者：
Irwin, P. G. J.
影响因子：
4.8
作者：
Adriani, A.;Bracco, A.;Bolton, S. J.
通讯作者：
Bolton, S. J.